Boring-machine.



No. 818,925. PATENTED APR. 24, 1906. A. J. TURNER.

BORING MACHINE.

APPLICATION FILED APR 22. 1905.

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No. 818,925 PATENTED APR. 24, 1906. A. J. TURNER.

BORING MACHINE.

APPLICATION FILED APB. 22, 1905.

2 SHEETS-SHEET 2.

I Q YKA Witneoow attowwi ANDRENV J. TURNER, OF MAYNARDVILLE, TENNESSEE.

BORING-MACHINE.

Specification of Letters Patent.

Patented April 24, 1906.

Application filed April 22,1905. Serial No. 256,953.

To (r /Z 111700111 it HZ fly concern:

Be it known that I, ANDREW J. TURNER, a citizen of the United States, residing at Maynardville, in the county of Union and State of Tennessee, have invented new and useful Improvements in Borin -whines, of which the following is a specification.

The invention relates to an improvement in boring-machines particularly designed for boring wagon fellies or wheel-rims, tenoning spokes, and other purposes.

The main object of the invention is the production of a machine comprising suitably constructed parts conveniently assembled and arranged for operation in conjunction with wagon wheels or spokes or the like.

Another object of the invention is to so construct the drill-feed that the boring pressure exerted against the drill will be of a spring nature, whereby cushioning and yielding pressure is obtained to avoid breakage of the drill or the like.

The preferred embodiment of the details of the structure of this invention is illustrated in the accompanying drawings, wherein Figure 1 is a view in elevation of my improved boring-machine. Fig. 2 is a longitudinal vertical section of the same, parts being shown in elevation. Fig. 3 is a plan of the machine. Fig. 4 is a transverse section. Fig. 5 is a detail perspective illustrating an adjustable platform for supporting the wheels to be operated upon. Fig. 6 is a detail perspective of the measuring-rod to limit the operation of the tool, and Fig. 7 is a detail perspective showing a supporting-casting for the feeding mechanism.

Referring to the drawings, wherein like parts are indicated by similar referencefigures throughout the several views, my improved drilling-machine comprises a bed, preferably including longitudinal frame-bars 1, supported at their ends upon suitably arranged and spaced legs 2. Intermediate the end of the bed is movably supported the work-table 3, comprising a standard 4, rising from a cross-bar 5, arranged to rest upon both longitudinal frame-bars 1 and formed at its outer end with an eye to fixedly receive a shaft 6, pivotally mounted in bearing-lugs 7, secured to the side of one of the frame-bars 1. The construct-ion is such that the standard 4 and cooperative parts may be swung bodily from above the bed to a position at one side thereof for a purpose hereinafter described.

The standard 4 is preferably square in crosssection and is slidably engaged by a squared sleeve 8, provided with a stud-screw 9 to secure the sleeves in adjusted position on the standard. To the sleeve 8 is secured a worktable 10, preferably of greater length than the width of the bed, and to this work-table, on opposite sides of its connection with the sleeve 8, I secure adjusting-arms 11, preferably comprising a right-angled member the horizontal plate of which underlies and is secured to the table 10, while the vertical plate rises at right angles to said table adjacent with the edge thereof next the standard 1. The vertical plate of the adjusting arm is provided with an adjusting screw 12, the purpose of which will readily appear. A sec ond squared sleeve 13, provided with a setscrew 14, slidably engages the standard 4 above the sleeve 8, the sleeve 13 on its forward edge being provided with a stud on which is mounted one end of a holding-lever 15, a nut 16 on the end of the stud operative to hold the lever in adjusted position with relation to the table.

The drilling mechanism 17 comprises the ordinary drill-head, having a base 18, a crank-wheel 19, and a longitudinal shaft 20, the latter carrying at its inner end the ordinary drill chuck 21 to receive a suitable tool 22. The base of the drill-head is particularly adapted for cooperation with my machine in that the lower end thereof is formed with projecting edges 23, arranged to slidably engage suitable grooves or tracks formed on the inner sides of the longitudinal frame-bars 1. By this construction the head is adapted for bodily movement longitudinally of the frame that is, toward and from the work-table 10.

The feeding mechanism for the drill-head comprises a sprocket-chain 25, arranged to engage sprocket-wheels 26 27, supported on shafts 28 29, respectively, the latter being arranged contiguous the rear end of the machine and preferably supported in a casting 30, provided with downwardly-inclined and spaced bearing-arms 31, between which arms the shaft 29 is revolubly. mounted. The horizontal plate of the casting 30 is secured immediately to and beneath the rear crossbar 32, adjoining the longitudinal frame-bars 1. One end of the chain 25 is connected directly to an ear 33, depending from the drillhead base 18, while the opposite end of the IIO provided with an operating-handle 37.

As a means for supporting the wheels for operation I arrange contiguous the front end of the frame-bed a supporting-standard 38,

arranged to receive the hub of the wheel to permit operation of the drill. This standard comprises a hollow thimble which in practice is passed over the upper end of the threaded rod 39, secured in the forward cross-bar of the frame-bed. A platform 40 is arranged near the lower end of the standard 38, the latter preferably passing through an opening formed in the platform. The platform is supported by a suitable framework comprising vertical bars 41, integrally connected at their lower end by a cross-bar 42, centrally provided with an opening 43, arranged to slidably engage the rod 39. An operating nut 44, engaging the rod 39, is arranged beneath the cross-bar 42 and may be manipulated in an obvious manner to elevate or depress the platform 40.

As a means for limiting the advance of the drill-head, and thereby absolutely determining the cutting depth of the tool, I arrange what I term a measuring device, comprising a longitudinally-arranged rod 45, preferably scaled and slidably mounted intermediate the frame-bars 1 in a bearing 47 of a cross-bar 46, fixed to said frame-bars. The cross-bar is provided with a set-screw 48, by which the measuring-rod 45 may be secured in adjusted position. The free end of this rodthat is, the end adjacent the drillhead-is arranged for contact with a square portion or shoulder 49, formed on the forward end of the head-base 18. From this construction it is evident-that the advancing drill-head will be limited in its movement through contact with the end 45, and the latter may be longitudinally adjusted to limit tlgle movement of the head, as may be desira e.

In operation the hub of the wheel is passed over the standard 38, the table 10 being swung out of the way. The handle 37 is turned to advance the drill-head until the end of the tool 22 contacts withthe rim of the wheel, when the advance of the head will be stopped by this contact. The handle 37,

owever, is further revolved to move the chain 25, thus extending the spring 34 and putting the same under considerable tension, a reverse movement of the chain being prevented by the engagement of the pawl 36 by the ratchet 35. The crank-wheel 19 is now suitably operated to turn the drill-shaft,and the wheel-rim is suitably bored as the spring 34 operates to gradually feed the head toward the wheel being operated upon, as will be evident. In event the hub of the wheel is to be bored the supporting-standard 4 and cooperating parts are swung out of the way on their pivoted shaft 6, allowing the drill 22 to be brought into operative engagement with the hub of the Wheel surrounding the standard 38 In the event rims of buggywheels are to be bored for tire-bolts the thimble 38 is removed from the rod 39 and the buggy-hub is passed over the rod 39, it being understood that the thimble 38, being of a size to receive the hubs of wagon-wheels, is too large for buggy-Wheel hubs and should therefore be removed. When boring new rimming or wagon-fellies, the section or piece is placed upon the table 10 with its concave edge or inside facing the tool 22, in which position the convex side of the rim rests against the screws 12, and the holding-lever 15 is turned downward to press the section tight against the table 10. In boring large pieces of timber, as wagon axles and the like, the squared section 13 is removed and the article held on the table 10. In tenoning wagon-spokes the hub of the wheel is supported on the standard and the spoke to be operated upon alined with the tool 22, the table 10 having been swung out of the way, as it is not necessary as a support in this operation. The shaft 20 may be driven by a power-wheel 50, suitably secured on the end of the shaft.

The construction described provides for the convenient manipulation of a wagon wheel or spoke to permit boring thereof by the adjacent tool, the feeding pressure of the tool being a spring-pressure and its power regulated at the will of the operator.

Having thus described the invention, what I claim as new is 1. A boring-machine comprising a framework, a work-support mounted at one end of the framework, a drill head movably supported at the opposite end of the framework, and a work-table hinged to one side of the framework intermediate the work-support and head, said work-table being adapted to be moved wholly out of line between the work support and head, whereby said head is adapted for cooperation with either the work table or support.

2. A boring-machine comprising a framework, a work-support mounted at one end of the framework, a drill-head supported at the opposite end of the framework, a work-table hinged to one side of the framework intermediate the support and. drill-head, said worktable being adapted for bodily movement into orout of operative alinement with the drillhead, and means for feeding the drill-head longitudinally of the framework.

3. A boring-machine comprising a framework, a work-support mounted at one end of the framework, a drill-head mounted at the opposite end of the framework, a feed-chain adapted to feed said head longitudinally of the framework, and a work-table hinged to one side of the framework intermediate the drill-head and work-support, whereby said table may be moved into and out of operative alin'ement between the drill-head and work-support.

l. A boring-machine comprising a frame work, a vertically-adjustable work-support mounted at one end of the framework, a d rill-head mounted at the opposite end of the framework, a feed-chain adapted to feed said head longitudinally of the framework, and a work-table hinged to one side of the framework intermediate the drill-head and worksupport, whereby said table may be moved into and out of operative alinement between the drill-head and work-support.

5. A boringmachine comprising a worksupport, a drill-head, a framework for sup porting said drill-head and work-support, an endless feed-chain arranged to feed said drillhead longitudinally of the framework, and a coil-spring forming a part of said feed-chain and tensioned in the movement of said chain, whereby the drill is moved longitudinally of the framework into contact with the material through the operation of the chain and fed for cutting the material by the tension of the spring, and means of moving the chain.

6. A boring-machine comprising a framework, a vertically-adjustable worl='support mounted upon one end of the framework, a drill-head movably supported at the opposite end of the framework, and a work-table hin ed to the framework intermediate the drill-head and work-support, said work-table being wholly movable into and out of operative alinement with the drill head, and means carried by the work-table for adjustably clamping material thereto.

7. A boring-machine including a work-table and a drill head, a chain having connection with the drill-head, means for feeding the chain to advance the drill-head toward a work-table, and a coil-spring forming a part of the length of said chain and adapted to be put under tension in the movement of said chain, whereby the drill-head is moved by the tension of said spring after being advanced to operative position in the movement of the chain.

In testimony whereof I aflix my signature in presence of two witnesses.

ANDREl/V J. TURNER. \Vitnesses:

C. L. BAKER, J. M. SHARP. 

